1 # configure.ac -- Go library configure script.
3 # Copyright 2009 The Go Authors. All rights reserved.
4 # Use of this source code is governed by a BSD-style
5 # license that can be found in the LICENSE file.
7 # Process this file with autoreconf to produce configure.
10 AC_INIT(package-unused, version-unused,, libgo)
11 AC_CONFIG_SRCDIR(Makefile.am)
12 AC_CONFIG_HEADER(config.h)
14 libtool_VERSION=13:0:0
15 AC_SUBST(libtool_VERSION)
17 AM_ENABLE_MULTILIB(, ..)
20 target_alias=${target_alias-$host_alias}
22 AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dist -Wall -Wno-portability])
23 AH_TEMPLATE(PACKAGE, [Name of package])
24 AH_TEMPLATE(VERSION, [Version number of package])
26 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibgo_PRECIOUS])
27 m4_define([_AC_ARG_VAR_PRECIOUS],[])
30 m4_rename_force([glibgo_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
36 # static hash tables crashes on AIX when libgo is built with O2
37 CFLAGS="$CFLAGS -fno-section-anchors"
38 GOCFLAGS="$GOCFLAGS -fno-section-anchors"
46 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
50 AC_SUBST(enable_shared)
51 AC_SUBST(enable_static)
53 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
54 AC_SUBST(CC_FOR_BUILD)
58 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
61 AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
62 [turns on -Werror @<:@default=yes@:>@])])
63 if test "x$enable_werror" != "xno"; then
69 glibgo_toolexeclibdir=no
71 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
72 AC_ARG_ENABLE([version-specific-runtime-libs],
73 AC_HELP_STRING([--enable-version-specific-runtime-libs],
74 [Specify that runtime libraries should be installed in a compiler-specific directory]),
76 yes) version_specific_libs=yes ;;
77 no) version_specific_libs=no ;;
78 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
80 [version_specific_libs=no])
81 AC_MSG_RESULT($version_specific_libs)
83 # Version-specific runtime libs processing.
84 if test $version_specific_libs = yes; then
85 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
86 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
89 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
90 # Install a library built with a cross compiler in tooldir, not libdir.
91 if test -n "$with_cross_host" &&
92 test x"$with_cross_host" != x"no"; then
93 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
94 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
96 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
97 nover_glibgo_toolexeclibdir='${libdir}'
99 multi_os_directory=`$GOC -print-multi-os-directory`
100 case $multi_os_directory in
101 .) ;; # Avoid trailing /.
102 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
105 if test x"$glibgo_toolexecdir" = x"no"; then
106 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
107 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
110 AC_SUBST(glibgo_toolexecdir)
111 AC_SUBST(glibgo_toolexeclibdir)
112 AC_SUBST(nover_glibgo_toolexeclibdir)
114 # See if the user wants to configure without libffi. Some
115 # architectures don't support it. FIXME: We should set a default
118 AS_HELP_STRING([--without-libffi],
121 [with_libffi=${with_libffi_default-yes}])
125 if test "$with_libffi" != no; then
126 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
127 LIBFFI=../libffi/libffi_convenience.la
128 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
132 AM_CONDITIONAL(USE_LIBFFI, test "$with_liffi" != "no")
134 # See if the user wants to configure without libatomic. This is useful if we are
135 # on an architecture for which libgo does not need an atomic support library and
136 # libatomic does not support our C compiler.
137 AC_ARG_WITH(libatomic,
138 AS_HELP_STRING([--without-libatomic],
139 [don't use libatomic]),
141 [with_libatomic=${with_libatomic_default-yes}])
144 if test "$with_libatomic" != no; then
145 LIBATOMIC=../libatomic/libatomic_convenience.la
149 # Used to tell GNU make to include a file without telling automake to
151 go_include="-include"
154 # All known GOOS values. This is the union of all operating systems
155 # supported by the gofrontend and all operating systems supported by
157 ALLGOOS="aix android darwin dragonfly freebsd irix linux netbsd openbsd plan9 rtems solaris windows"
171 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
172 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
173 *-*-irix6*) is_irix=yes; GOOS=irix ;;
174 *-*-linux*) is_linux=yes; GOOS=linux ;;
175 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
176 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
177 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
178 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
179 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
180 *-*-aix*) is_aix=yes; GOOS=aix ;;
182 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
183 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
184 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
185 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
186 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
187 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
188 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
189 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
190 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
191 AM_CONDITIONAL(LIBGO_IS_AIX, test $is_aix = yes)
192 AM_CONDITIONAL(LIBGO_IS_BSD, test $is_darwin = yes -o $is_dragonfly = yes -o $is_freebsd = yes -o $is_netbsd = yes -o $is_openbsd = yes)
196 dnl Test whether we need to use DejaGNU or whether we can use the
197 dnl simpler gotest approach. We can only use gotest for a native
201 *-*-rtems*) USE_DEJAGNU=yes ;;
203 *) USE_DEJAGNU=yes ;;
205 AC_SUBST(USE_DEJAGNU)
207 # All known GOARCH values. This is the union of all architectures
208 # supported by the gofrontend and all architectures supported by the
210 # To add a new architecture:
211 # - add it to this list
212 # - if appropriate, add an entry to ALLGOARCHFAMILY below
213 # - add an entry to the case on ${host} below to set GOARCH
214 # - update goarchList in libgo/go/go/build/syslist.go
215 # - update goarch.sh to report the values for this architecture
216 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
217 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
218 # - update arch lists in libgo/match.sh
219 # - update arch lists in libgo/testsuite/gotest
220 # - update +build lines in several places
221 # - libgo/go/runtime/lfstack_NNbit.go
222 # - libgo/go/runtime/hashNN.go
223 # - libgo/go/runtime/unalignedN.go
224 # - libgo/go/syscall/endian_XX.go
226 # - possibly update files in libgo/go/internal/syscall/unix
227 ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le nios2 ppc ppc64 ppc64le riscv riscv64 s390 s390x sh shbe sparc sparc64 wasm"
229 # All known GOARCH family values.
230 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 NIOS2 PPC PPC64 RISCV RISCV64 S390 S390X SH SPARC SPARC64 WASM"
240 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
249 i[34567]86-*-* | x86_64-*-*)
266 #if _MIPS_SIM != _ABIO32
271 #if _MIPS_SIM != _ABIN32
276 #if _MIPS_SIM != _ABI64
280 [AC_MSG_ERROR([unknown MIPS ABI])
281 [mips_abi="n32"]])])])
283 "o32") GOARCH=mips ;;
284 "n32") GOARCH=mips64p32 ;;
285 "n64") GOARCH=mips64 ;;
296 rs6000*-*-* | powerpc*-*-*)
304 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
315 #if defined(__s390x__)
321 sh3eb*-*-* | sh4eb*-*-*)
329 #if defined(__sparcv9) || defined(__arch64__)
338 AC_SUBST(ALLGOARCHFAMILY)
340 dnl Some files are only present when needed for specific architectures.
342 GO_LIBCALL_OS_ARCH_FILE=
344 GO_SYSCALL_OS_ARCH_FILE=
345 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
346 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
348 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
349 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
351 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
352 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
354 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
355 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
357 AC_SUBST(GO_LIBCALL_OS_FILE)
358 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
359 AC_SUBST(GO_SYSCALL_OS_FILE)
360 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
362 dnl Special flags used to generate sysinfo.go.
363 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
366 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
367 # msghdr in <sys/socket.h>.
368 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
370 *-*-solaris2.1[[01]])
371 # Solaris 10+ needs this so struct msghdr gets the msg_control
372 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
373 # above doesn't work with C99.
374 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
379 dnl Check if assembler supports disabling hardware capability support.
380 GCC_CHECK_ASSEMBLER_HWCAP
382 dnl Use -fsplit-stack when compiling C code if available.
383 AC_CACHE_CHECK([whether -fsplit-stack is supported],
384 [libgo_cv_c_split_stack_supported],
386 CFLAGS="$CFLAGS -fsplit-stack"
387 AC_COMPILE_IFELSE([[int i;]],
388 [libgo_cv_c_split_stack_supported=yes],
389 [libgo_cv_c_split_stack_supported=no])
390 CFLAGS=$CFLAGS_hold])
392 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
393 dnl reject split-stack code calling non-split-stack code on targets
394 dnl they don't support.
395 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
396 [libgo_cv_c_linker_split_non_split],
397 [cat > conftest1.c << EOF
399 int main() { f(); return 0; }
401 cat > conftest2.c << EOF
404 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
405 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
406 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
407 libgo_cv_c_linker_split_non_split=yes
409 libgo_cv_c_linker_split_non_split=no
411 rm -f conftest1.* conftest2.* conftest])
413 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
414 SPLIT_STACK=-fsplit-stack
415 AC_DEFINE(USING_SPLIT_STACK, 1,
416 [Define if the compiler supports -fsplit-stack])
420 AC_SUBST(SPLIT_STACK)
421 AM_CONDITIONAL(USING_SPLIT_STACK,
422 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
424 dnl If the compiler supports split-stack but the linker does not, then
425 dnl we need to explicitly disable split-stack for Go.
426 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
427 GO_SPLIT_STACK=-fno-split-stack
431 AC_SUBST(GO_SPLIT_STACK)
433 dnl Check whether the linker does stack munging when calling from
434 dnl split-stack into non-split-stack code. We check this by looking
435 dnl at the --help output. FIXME: This is only half right: it's
436 dnl possible for the linker to support this for some targets but not
438 dnl This is slightly different from the above check, which is whether
439 dnl the linker permits the call at all.
440 AC_CACHE_CHECK([whether linker supports split stack],
441 [libgo_cv_c_linker_supports_split_stack],
442 [libgo_cv_c_linker_supports_split_stack=no
443 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
444 libgo_cv_c_linker_supports_split_stack=yes
446 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
447 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
448 [Define if the linker support split stack adjustments])
451 AC_CACHE_CHECK([whether compiler is llgo],
452 [libgo_cv_c_goc_is_llgo],
453 [libgo_cv_c_goc_is_llgo=no
454 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
455 libgo_cv_c_goc_is_llgo=yes
457 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
459 dnl Test for the -lm library.
461 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
464 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
465 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
466 [libgo_cv_lib_sockets=
468 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
469 if test "$libgo_check_socket" = "yes"; then
470 unset ac_cv_func_connect
471 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
472 libgo_check_both=yes)
474 if test "$libgo_check_both" = "yes"; then
476 LIBS="$LIBS -lsocket -lnsl"
477 unset ac_cv_func_accept
478 AC_CHECK_FUNC(accept,
480 libgo_cv_lib_sockets="-lsocket -lnsl"])
481 unset ac_cv_func_accept
484 unset ac_cv_func_gethostbyname
485 libgo_old_libs="$LIBS"
486 AC_CHECK_FUNC(gethostbyname, ,
487 [AC_CHECK_LIB(nsl, main,
488 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
489 unset ac_cv_func_gethostbyname
490 AC_CHECK_FUNC(sendfile, ,
491 [AC_CHECK_LIB(sendfile, main,
492 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
495 NET_LIBS="$libgo_cv_lib_sockets"
498 dnl Test whether the compiler supports the -pthread option.
499 AC_CACHE_CHECK([whether -pthread is supported],
500 [libgo_cv_lib_pthread],
502 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
503 AC_COMPILE_IFELSE([[int i;]],
504 [libgo_cv_lib_pthread=yes],
505 [libgo_cv_lib_pthread=no])
506 CFLAGS=$CFLAGS_hold])
508 if test "$libgo_cv_lib_pthread" = yes; then
509 # RISC-V apparently adds -latomic when using -pthread.
510 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
512 AC_SUBST(PTHREAD_CFLAGS)
514 dnl Test for the -lpthread library.
516 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
517 AC_SUBST(PTHREAD_LIBS)
519 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
520 AC_SEARCH_LIBS([sched_yield], [rt])
521 AC_SEARCH_LIBS([nanosleep], [rt])
522 AC_SEARCH_LIBS([clock_gettime], [rt])
526 GCC_CHECK_UNWIND_GETIPINFO
528 AC_CHECK_HEADERS(port.h sched.h semaphore.h sys/file.h sys/mman.h syscall.h sys/epoll.h sys/event.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/ptrace.h linux/reboot.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
530 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
531 [#include <netinet/in.h>
534 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
535 [#ifdef HAVE_SYS_SOCKET_H
536 #include <sys/socket.h>
540 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
542 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
543 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
544 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
546 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
548 AC_CHECK_TYPES([loff_t])
552 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
555 CFLAGS_hold="$CFLAGS"
556 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
558 LIBS="$LIBS $PTHREAD_LIBS"
559 AC_CHECK_FUNCS(sem_timedwait)
560 CFLAGS="$CFLAGS_hold"
564 LIBS="$LIBS $MATH_LIBS"
565 AC_CHECK_FUNCS(matherr)
568 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
569 [libgo_cv_func___sync_bool_compare_and_swap_4],
571 typedef unsigned int uint32 __attribute__ ((mode (SI)));
573 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
575 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
576 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
577 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
578 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
579 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
582 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
583 [libgo_cv_func___sync_bool_compare_and_swap_8],
585 typedef unsigned int uint64 __attribute__ ((mode (DI)));
587 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
589 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
590 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
591 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
592 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
593 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
596 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
597 [libgo_cv_func___sync_fetch_and_add_4],
599 typedef unsigned int uint32 __attribute__ ((mode (SI)));
601 int main() { return __sync_fetch_and_add (&i, 1); }
603 [libgo_cv_func___sync_fetch_and_add_4=yes],
604 [libgo_cv_func___sync_fetch_and_add_4=no])])
605 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
606 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
607 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
610 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
611 [libgo_cv_func___sync_add_and_fetch_8],
613 typedef unsigned int uint64 __attribute__ ((mode (DI)));
615 int main() { return __sync_add_and_fetch (&i, 1); }
617 [libgo_cv_func___sync_add_and_fetch_8=yes],
618 [libgo_cv_func___sync_add_and_fetch_8=no])])
619 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
620 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
621 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
624 dnl For x86 we want to use the -minline-all-stringops option to avoid
625 dnl forcing a stack split when calling memcpy and friends.
626 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
627 [libgo_cv_c_stringops],
629 CFLAGS="$CFLAGS -minline-all-stringops"
630 AC_COMPILE_IFELSE([int i;],
631 [libgo_cv_c_stringops=yes],
632 [libgo_cv_c_stringops=no])
633 CFLAGS=$CFLAGS_hold])
635 if test "$libgo_cv_c_stringops" = yes; then
636 STRINGOPS_FLAG=-minline-all-stringops
638 AC_SUBST(STRINGOPS_FLAG)
640 dnl For x86 we want to compile the math library with -mfancy-math-387
641 dnl so that we can use the builtin instructions directly.
642 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
643 [libgo_cv_c_fancymath],
645 CFLAGS="$CFLAGS -mfancy-math-387"
646 AC_COMPILE_IFELSE([int i;],
647 [libgo_cv_c_fancymath=yes],
648 [libgo_cv_c_fancymath=no])
649 CFLAGS=$CFLAGS_hold])
651 if test "$libgo_cv_c_fancymath" = yes; then
652 MATH_FLAG="-mfancy-math-387"
654 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
658 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
659 AC_CHECK_TYPES([off64_t])
662 dnl Work out the size of the epoll_events struct on GNU/Linux.
663 AC_CACHE_CHECK([epoll_event size],
664 [libgo_cv_c_epoll_event_size],
665 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
666 [sizeof (struct epoll_event)],
667 [#include <sys/epoll.h>],
668 [libgo_cv_c_epoll_event_size=0])])
669 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
670 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
672 dnl Work out the offset of the fd field in the epoll_events struct on
674 AC_CACHE_CHECK([epoll_event data.fd offset],
675 [libgo_cv_c_epoll_event_fd_offset],
676 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
677 [offsetof (struct epoll_event, data.fd)],
679 #include <sys/epoll.h>],
680 [libgo_cv_c_epoll_event_fd_offset=0])])
681 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
682 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
684 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
685 dnl in Solaris 11.4 for XPG7 compatibility.
686 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
687 [have_stat_timespec=yes], [have_stat_timespec=no])
688 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
690 dnl See if struct exception is defined in <math.h>.
691 AC_CHECK_TYPE([struct exception],
692 [libgo_has_struct_exception=yes],
693 [libgo_has_struct_exception=no],
695 if test "$libgo_has_struct_exception" = "yes"; then
696 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
697 [Define to 1 if <math.h> defines struct exception])
700 dnl See whether setcontext changes the value of TLS variables.
701 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
702 [libgo_cv_lib_setcontext_clobbers_tls],
703 [CFLAGS_hold="$CFLAGS"
704 CFLAGS="$PTHREAD_CFLAGS"
706 LIBS="$LIBS $PTHREAD_LIBS"
707 AC_CHECK_SIZEOF([void *])
708 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
713 #include <ucontext.h>
718 static char stack[[10 * 1024 * 1024]];
721 /* Called via makecontext/setcontext. */
729 /* Called via pthread_create. */
734 /* The thread should still see this value after calling
740 /* The call to setcontext should not return. */
749 /* The thread should not see this value. */
752 if (getcontext (&c) < 0)
755 c.uc_stack.ss_sp = stack;
756 #ifdef MAKECONTEXT_STACK_TOP
757 c.uc_stack.ss_sp += sizeof stack;
759 c.uc_stack.ss_flags = 0;
760 c.uc_stack.ss_size = sizeof stack;
762 makecontext (&c, cfn, 0);
764 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
767 if (pthread_join (tid, NULL) != 0)
770 /* The thread should have called exit. */
774 [libgo_cv_lib_setcontext_clobbers_tls=no],
775 [libgo_cv_lib_setcontext_clobbers_tls=yes],
776 [case "$target:$ptr_type_size" in
777 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
778 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
780 libgo_cv_lib_setcontext_clobbers_tls=no ;;
783 CFLAGS="$CFLAGS_hold"
786 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
787 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
788 [Define if setcontext clobbers TLS variables])
791 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
792 libgo_cv_ro_eh_frame, [
793 libgo_cv_ro_eh_frame=no
794 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
795 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
796 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
797 libgo_cv_ro_eh_frame=yes
798 elif grep '.section.*eh_frame.*#alloc' conftest.c \
799 | grep -v '#write' > /dev/null; then
800 libgo_cv_ro_eh_frame=yes
805 if test "x$libgo_cv_ro_eh_frame" = xyes; then
806 AC_DEFINE(EH_FRAME_FLAGS, "a",
807 [Define to the flags needed for the .section .eh_frame directive.])
809 AC_DEFINE(EH_FRAME_FLAGS, "aw",
810 [Define to the flags needed for the .section .eh_frame directive.])
813 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
814 [libgo_cv_c_unused_arguments],
816 CFLAGS="$CFLAGS -Qunused-arguments"
817 AC_COMPILE_IFELSE([[int i;]],
818 [libgo_cv_c_unused_arguments=yes],
819 [libgo_cv_c_unused_arguments=no])
820 CFLAGS=$CFLAGS_hold])
822 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
823 libgo_cv_as_comdat_gnu, [
824 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
826 if test "$libgo_cv_c_unused_arguments" = yes; then
827 CFLAGS="$CFLAGS -Qunused-arguments"
829 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
830 libgo_cv_as_comdat_gnu=yes
832 libgo_cv_as_comdat_gnu=no
836 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
837 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
838 [Define if your assembler supports GNU comdat group syntax.])
841 AC_CACHE_CHECK([assembler supports pc related relocs],
842 libgo_cv_as_x86_pcrel, [
843 libgo_cv_as_x86_pcrel=yes
844 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
846 if test "$libgo_cv_c_unused_arguments" = yes; then
847 CFLAGS="$CFLAGS -Qunused-arguments"
849 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
850 libgo_cv_as_x86_pcrel=no
854 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
855 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
856 [Define if your assembler supports PC relative relocs.])
859 AC_CACHE_CHECK([assembler supports unwind section type],
860 libgo_cv_as_x86_64_unwind_section_type, [
861 libgo_cv_as_x86_64_unwind_section_type=yes
862 echo '.section .eh_frame,"a",@unwind' > conftest.s
864 if test "$libgo_cv_c_unused_arguments" = yes; then
865 CFLAGS="$CFLAGS -Qunused-arguments"
867 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
868 libgo_cv_as_x86_64_unwind_section_type=no
872 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
873 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
874 [Define if your assembler supports unwind section type.])
877 AC_CACHE_CHECK([assembler supports AES instructions],
878 libgo_cv_as_x86_aes, [
879 libgo_cv_as_x86_aes=yes
880 echo 'aesenc %xmm0, %xmm1' > conftest.s
882 if test "$libgo_cv_c_unused_arguments" = yes; then
883 CFLAGS="$CFLAGS -Qunused-arguments"
885 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
886 libgo_cv_as_x86_aes=no
890 if test "x$libgo_cv_as_x86_aes" = xyes; then
891 AC_DEFINE(HAVE_AS_X86_AES, 1,
892 [Define if your assembler supports AES instructions.])
897 if test ${multilib} = yes; then
898 multilib_arg="--enable-multilib"
903 AC_CONFIG_FILES(Makefile testsuite/Makefile)
905 AC_CONFIG_COMMANDS([default],
906 [if test -n "$CONFIG_FILES"; then
907 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
908 # that multilib installs will end up installed in the correct place.
909 # The testsuite needs it for multilib-aware ABI baseline files.
910 # To work around this not being passed down from config-ml.in ->
911 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
912 # append it here. Only modify Makefiles that have just been created.
914 # Also, get rid of this simulated-VPATH thing that automake does.
916 s!`test -f '$<' || echo '$(srcdir)/'`!!
918 for i in $SUBDIRS; do
919 case $CONFIG_FILES in
921 #echo "Adding MULTISUBDIR to $i/Makefile"
922 sed -f vpsed $i/Makefile > tmp
923 grep '^MULTISUBDIR =' Makefile >> tmp
932 # Variables needed in config.status (file generation) which aren't already
933 # passed by autoconf.